September 22, 2026

Garnet, Amethyst and Citrine: The Underrated Antique Stones

By Sasha Tarasova

Filed under Gemstone Guides

Short answer: garnet, amethyst and citrine were all considerably more valuable in the past than they are now, and their prices fell because new deposits were discovered rather than because anything changed about the stones. Antique jewelry set with them is therefore priced well below the quality of its goldsmithing — which makes it the cheapest honest route into genuine period craftsmanship. One exception matters: demantoid garnet, which is rarer than most sapphire and priced accordingly.

Amethyst: the stone that lost a fortune to Brazil

Amethyst was once ranked among the cardinal gems alongside diamond, ruby, sapphire and emerald. It appears in ecclesiastical jewelry, in royal collections, and in Georgian settings that treat it with the seriousness now reserved for far scarcer stones.

Then, during the nineteenth century, very large deposits were found in Brazil and Uruguay. Supply expanded enormously, and the price collapsed and never recovered.

Nothing about the stone changed. A fine deep purple amethyst in a Georgian mount is exactly as beautiful as it was when it cost a fortune. It simply stopped being rare.

What to look for

Colour is everything. The most valued is a deep, saturated purple with red or blue secondary flashes — the trade term Siberian is used for top colour regardless of where a stone actually came from.

Watch for colour zoning: amethyst frequently grows in bands, and a poorly cut stone shows visible stripes of stronger and weaker colour. Good cutting orients the stone to distribute colour evenly.

One genuine care point: amethyst fades. Prolonged exposure to strong sunlight and heat permanently lightens it. An antique amethyst that looks weak may have faded rather than started pale, and there is no way back. Keep them out of direct sun and away from windowsills.

Where you will find it

Georgian foiled closed-back settings, Victorian brooches and pendants, and a great deal of half-mourning jewelry — amethyst and pearl was the permitted combination as mourning eased, which is why the pairing recurs so often in late Victorian work.

Citrine: mostly not what it says

Citrine is yellow to orange quartz, chemically the same material as amethyst with different iron behaviour.

The fact worth knowing before you buy: most citrine on the market is heat-treated amethyst. Natural citrine is genuinely uncommon; heating amethyst converts it reliably to yellow, orange or reddish-brown. The treatment is permanent, stable and entirely accepted in the trade.

It should still be disclosed. Our treatments guide covers where this sits relative to treatments that actually destroy value — heating quartz does not, but a seller who will not answer the question is telling you about themselves.

Colour terms you will meet: Madeira for deep orange-red, palmeira for a warmer orange. Both are trade descriptions rather than origins.

Citrine's moment is the 1940s, when large golden stones were exactly what the era wanted. Our guides to Retro jewelry and cocktail rings cover why.

Garnet: not one stone, a family

This is where most buyers underestimate what they are looking at, because "garnet" covers a mineral group with dramatically different members.

Bohemian garnet

The most recognisable antique garnet jewelry. Dense masses of small rose-cut pyrope garnets set close together in low-karat gold or gilt metal, from what is now the Czech Republic. Victorian bracelets, brooches and necklaces of this type were made in enormous quantity and are still comparatively affordable.

Check them for missing stones — with hundreds of tiny garnets in one piece, gaps are common and matching replacements is difficult.

Demantoid: the exception

Demantoid garnet is the reason to look twice at anything green in a late Victorian or Edwardian setting.

Discovered in the Russian Urals in the nineteenth century, it is a vivid green garnet with dispersion higher than diamond — it throws more fire than almost any other stone. Fine demantoid exceeds the price of a great many sapphires, and Russian material carries a premium above later sources.

Its diagnostic feature is a wispy, radiating inclusion known as a horsetail. Uniquely among gemstones, this inclusion is considered desirable: it confirms natural origin and, for Russian stones, helps support attribution. An inclusion that adds value is rare enough to be worth remembering.

Demantoid appears in Edwardian work, often as small accents in platinum alongside diamonds, and in Art Nouveau pieces where green suited the naturalistic vocabulary. Green stones in period jewelry are sometimes catalogued vaguely as "green garnet" or even as peridot by sellers who have not looked closely. That is where the opportunity is.

Why these stones are the best value in antique jewelry

The logic is straightforward. In most antique jewelry the stone carries the price. With amethyst, citrine and common garnet the stone is cheap — so what you are actually buying is the goldsmithing, the design and the era, at a price set by a stone that stopped being scarce a century ago.

A Victorian amethyst and seed pearl pendant, or a Retro citrine cocktail ring, delivers genuine period craftsmanship for a fraction of what a diamond piece of equivalent workmanship costs. For anyone building a collection rather than buying a single significant piece, this is where to start — our guide to starting a collection without getting burned makes the same argument from a different direction.

Durability, honestly

Amethyst and citrine are quartz at 7 on the Mohs scale. Garnet runs roughly 6.5 to 7.5 depending on variety. All are perfectly wearable, but none approaches sapphire at 9, and the difference in the Mohs scale is not linear — our hardness guide explains why a 7 abrades far faster than a 9 in ordinary life.

Practically: these stones are excellent in pendants, brooches and earrings, good in occasional-wear rings, and a compromise in a ring worn every day. Faceted edges soften over years of contact, and step-cut corners chip.

Garnet has one additional quirk: some varieties are sensitive to sudden temperature change and can fracture. Tell any jeweler what the stone is before they apply heat.

Questions people actually ask

Why was amethyst once so valuable?

It was scarce in Europe until large Brazilian and Uruguayan deposits were found in the nineteenth century. Supply, not quality, set the old price.

Is my citrine really amethyst?

Statistically, probably — most citrine is heat-treated amethyst. The treatment is permanent and accepted, and it should be disclosed.

Which garnet is worth the most?

Demantoid, by a wide margin. Look for vivid green and horsetail inclusions, particularly in late Victorian and Edwardian settings.

Does amethyst fade?

Yes, permanently, with prolonged sun and heat. Keep it out of direct light.

Are these good stones for an engagement ring?

They can be, with realistic expectations. At 7 on the Mohs scale they will show wear that a sapphire would not. A protective bezel setting helps considerably.

Hunting a particular stone — a demantoid, a deep Siberian-colour amethyst, a specific Bohemian piece? Tell us what you are after.